Jon:

FWIW: If you really want to upgrade, why not join go for an infinite baffle sub? Appears to be the best performance you can get and doesn't cost an arm and a leg. I ordered my 4 15" drivers from Stryke last week for $400. Another few hundred for an amp and $120 for a BFD, and by all accounts I will have a sub that will blow any box out of the water. I just discovered the concept a few weeks ago myself.

Sorry I am not up to speed on inserting links, but Google "Cult of IB" for the Cult of the Infinitely Baffled. Even SVS's website (I was planning on getting an SVS) discusses the bigger the box the bigger the sound. You can't go bigger than infinite baffle. I realize that they are not for everyone, but I think everyone should be aware of them.

Do any Axiom owners have IB's? I saw an old thread in the subject, but it doesn't appear many people have them.

Pete